export function setRem (): void{
  const screenWidth:number = document.documentElement.clientWidth;
  let fontSize = screenWidth * 16 / 1280;
  if(screenWidth <= 750){
    fontSize = screenWidth * 16 / 750;
  }
  document.documentElement.style.fontSize = `${fontSize}px`;
}
setRem();
window.onresize = setRem;